Pentax 65794 XCF 12x50 Binoculars with Case 12 X 50mm XCF Binoculars Fully-multi-coated Optical Elements Bak4 Glass Prisms Deliver Exceptional Image Quality Rubber Armoring Adds Durability Multi-coated lenses provide optimal resolution. Center focusing to instantly bring images into focus. Rubber-armored to protect the optics and mechanical systems. Ergonomic design for easy handling. Protected by a Worry-Free Warranty.